Locomotive.



M. MAHONEY.

LOGOMOTIVE.

APPLIOATION FILED MAR. 20, 1911.

Patented Nov.1s,1913.

WITNESSES ATTORNEY PATENT OFFIGE.

MYLES mmownv, or wILKINsBURe, rnivlvsrrvn vm, mi ses rownsrrnenousnmznornrc AND MANUFACTURING COMPANY, a comer-Arrow or BENNSYLVANIA.

LOCOMQTJIVE.

Specification o L tte min Application filed March 20, 1911. Serial No.615,536.

'connection with locomotives which are propelled by electric motors,though not necessarily restricted to locomotives so operated.

One object of my invention is to provide a simple and ofio' ive' con eio b e nw l om ive truc s, p e era y omp ins hor indep nd n radius ar wha relieved from compression strains and which are so arranged as toerrnit of circumferential movement of one truck relative to a pivotalpoint in the other and to transmit driving forces from one truck to theother only in one direction.

Another object of-noy invention is to pro vide an efiicient and compactstructure for a locomotive having a central main truck, preferablyconstituting a rigid wheel base, and ra i l t u a its ends- Locomotiveswhich are capable of drawing very heavy loads at relatively high seedshave frequently comprised a'pluraliy of centrally located driving axlesand ony trucks located at its ends and having relatively small guidewheels. Ithas been my aim to reduce the rigid-wheel base of locomotivesofthis general character, although my invention is not restricted to anyarticular type of locomotive, by providing a radial truck at each end ofthe locomfitive having small guide wheels on its outer axle andrelatively large driving wheels and driving motors associated with itsinner axle. Each of the radial trucks is connected to the main truck orframe of the locomotive by means of a pair of short radius bars thecenter lines of which, if extended, meet in a cross tie of the maintruck, in which means is provided for laterally restraining the radialtruck. The arrangement of parts is such that the radius bars cooperatewith the restraining means in permitting the usual circumferentialadjustment of the radial truck. The radius bars are, however, notdepended on for taking the compression strains caused by a pushingv orbumpmg action in case of engagement with another Patented Howls, 191 3.

adapted to'be forced aaginst the adjacent e bea of the main tracl r,"under these conditions.

In the accompanying draw ng, Figure 1' is a pla V ew of ubs ntia y noalfo nd Fig- 2 is a d e ion a locomotive truck structure, p arts beingbroken away,

of the structure shown in Fig. 1, certain" parts being broken away andin section.

The main frame ports a suitable cab (not shownyand' is, in turn,supported by two pairs of truck wheels 2 which constitute a rlgid wheelbaseand o h lo omot peach of which is operatively connected to a pair ofelectric motors 3 that aresuitably mounted above the wheel axlest. Eachend of the locomotive is rovided with a four wheel'radial truck 5, apairof -largewheels- 6 that are suitably geared to a'pair of electric'motors7 which are mo untedabove the axle 8 and bear the samerelation theretoand to the corresponding; truck wheels as that borne by the pair ofelectric motors 3 and the truck wheels 2 to the axles 4:.con-

stituting parts of the rigid wheel base.

The inner end of theframe 9"of each radial truckis provided with alongitudinally projecting nose 10 having convexly curved sides which fitbetweenjaws 11 with which a cross tie 12 of themain frame is provided.Any other suitable means may be utilized for laterally restraining-thetruclr in the plane of the cross tie 12,- :The radial truck frame .9isprovided, at each side,

witha pair of lugs or ears l3-between which is pivotally mounted. oneend of a bar 14: by means of a pin 15, the bar being inclined in wardlyatsuch an angle that its axis is disposed in the line of a radius ofcurvature'having the nose lQat the rear end of the frame as its center.The inner end of each bar 14 is connected to ,the end beamlG, of themain.

frame by, means of a pin 17, the bar being providedwith an elongatedslot 18 to re ceive the pin in order to permit of lost motion and,interposed between a shoulder '19, on the bar and a pivoted block 20 isa helical spring 21 to act as a yielding buffer in case of pushing orbumping action. The draft bars 14 are relieved from compression strainsunder pushing or bumping action, 110

.of my present invention.

by means of an elevated central longitudinal beam 22 of the radialtruck, having a concave plate 23 which is .o posed to an end piece 24 ofthe main truc The end piece 24 has a convex c lindrically curved outersurface correspon ing to the adjacent surface of the plate 23, bothcurvatures being concentric with the pivotal point of the truck.

Since-the bars 14 are radially disposed relative to the pivotal pointofthe radial truck they tend to maintain an alinement between the truckswhich they connect. This tendency is augmented by the spring 21 but somewell knowncentering device is preferably employed in addition thereto,al though none is shown since it forms no part The principal object ofthe springs 21 is to cushion the bumping strains, as above indicated,and the end piece 24 or the plate 23 or both may be backed by suitablesprings in lieu of the springs 21. r

It will be understood from the foregoing description that the radialtrucks may be removed without disturbing any of the other portions ofthe structure except the pins 15 and that they may be as readilyreplaced in position when any changes or repairs which necessitate theremoval have been effected.

I claim as my invention:

1. A locomotive comprising two fourwheel, motor-equipped trucks and twoindependentjradius'bars interposed between said trucks and provided withyielding connections to obviate bumping strains.

2. A locomotive comprising a plurality of motor-equipped trucks, andindependent radius bars interposed between said trucks and provided withyielding resilient means to relieve them from longitudinal compressionstrains.

3. In a locomotive, the combination with a motor-equipped main truck anda motorequipped radial truck, of interposed short radius bars, and meansfor permitting circumferential movement of the radial truck about apoint in the main truck that is re- .mote from said radius bars.

4. In a. locomotive, the combination with a main truck, of a radialtruck and means carried by. the main truck for laterally restrainingrelative movement of the radial truck in a predeterminedlateral plane,and

Copies of this patent may be obtained for 5. In a locomotive, thecombination with.

a main truck, of a radial truck and means carried by the main truck forlaterally restricting relative movement of the radial truck in apredetermined lateral plane, and radius bars connecting the two trucksand provided with lost motion connections to one of them.

6. In a locomotive, the combination with a main truck frame and itswheels and axles, of a radial truck frame having a nose at its inner endto engage a recess in a cross beam of the main truck frame, radius barshaving slot and pin connections with the adjacent end of the main truckframe, and means for relieving said radius bars from compressionstrains.

7. In a locomotive, the combination with a main truck having a rigidwheel base, of an end truck having a pivotal connection between itsinner end and a cross tie of the main frame, radius bars havinglost-motion connections with the adjacent end of the main truck frame,and means for relieving said radius bars from compression strains.

8. In a locomotive, the combination with a main truck having a rigidwheel base, of an end truckhaving a pivotal connection with a cross" tieof the main truck frame, radius bars having lost-motion connectionsbetween the sides of the end truck frame and the adjacent end of themain truck frame, springs for taking up the lost-motion of saidconnections, and cooperating curved-surface impact plates upon the twotruck frames.

9. In a locomotive, the combination with a main truckhaving a rigidwheel base, a radial end truck, means in a cross tie of the main truckframe for laterally restraining the end truck, radius bars havingdetachable pivotal connections to the said truck frames, and means forrelieving said radius bars from longitudinal compression strains.

In testimony whereof, I have hereunto subscribed my name this 14th dayof March, 1911.

. MYLES MAHONEY.

Witnesses: R. J. Demo, B. B. Hmns.

Washington, D. G.

five cents each, by addressing the Commissioner of mesa,

